Some databases have a citation tool embedded within them. These almost never produce a perfect citation but can give you a rough draft which you can then improve by using the style guides or the Perdue University webpages mentioned above.
Most Ebsco databases have a citation option, and articles can usually be mailed to yourself from within the databases with a citation included.
Proquest database and JSTOR also have citation options.
You will need to search in the databases to find them. Sometimes citation functions are associated with mailing functions and sometimes they are stand-alone. Not all databases have these options.
Check with a librarian for further information and assistance on how to find and use citation resources within databases.
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